<!DOCTYPE html>
<html>
<head>
   <meta charset="utf-8">
</head>
<body>
     <img id="myimg" src="../imgs/mm016.jpg" alt="MM016" width="600" height="300" loadpic="我也不知道" data-img="66666">

     <script>
       console.log(myimg.src);
       console.log(myimg.getAttribute('src'));
       console.log(myimg.getAttributeNode('src').nodeValue);

       console.log(myimg.loadpic);
       console.log(myimg.getAttribute('loadpic'));

       console.log(myimg.getAttribute('data-img'));
       console.log(myimg.getAttributeNode('data-img').nodeValue);
     </script>
</body>
</html>